What are good practices to keep in mind when lighting for scene-referred data?
As far I understand it, you can check your scene exposure and range by switching to one of the False Color looks in Color Management. 

Here's what the colors mean:


Low Clipping Black Scene Linear value 0.000176272 and below 
Nine Stops Down = Purple Scene Linear value 0.000351384 to 0.000702411.
Eight Stops Down = Blue Scene Linear value 0.000702411 to 0.002814643. 
Six Stops Down = Cyan Scene Linear value 0.002814643 to 0.044567918.
Two Stops Down = Green Scene Linear value 0.044567918 to 0.018009142.
Middle Grey = Gray Scene Linear value 0.018009142. 
Two Stops Over = Green Scene Linear value 0.719634476 to 2.883658483.
Four Stops Over = Yellow Scene Linear value 2.883658483 to 11.39491214. 
Six Stops Over = Red Scene Linear value 11.39491214 to 16.29174024.
High Clipping = White Scene Linear value 16.29174024 and above.


I've been recomended to make sure you don't see red or white which means you're probably overexposed in those areas. Likewise with avoiding the lowest regions of Black and Purple which indicates severe underexposure. If you can get a well exposed image rendered out, you can make a wide range of lighting adjustments in the compositor with the Color Balance node in CDL mode.

Troy S may need to correct this, but this is my current understanding of creating balance lighting in your scene.